Mysql：获取表中的所有链接行

Question

I have a table structure

kinda like this

id  |   title | next 
1   |  test   | 5
2   |  test   | 0
3   |  test   | 0
4   |  test   | 0
5   |  test   | 3

Now, as you see 1 points to next item 5 and 5 points to next item 3 and 3 denotes the end

I need a query, from which I can get 1, 5, 3 serially in one column and their title also

like

result | title
--------------
1      |  test
5      |  test
3      |  test
--------

please help. I dont even know how to get started at such query.

Answer 1

您需要的是树查询 - 检查是否可以在单个查询中查询MySQL中的树结构表到任何深度？

Answer 2

What you want to do here is join the table on itself.

SELECT * FROM `table` AS `child` 
JOIN `table` AS `parent` 
ON `parent`.`next` = `child`.`id`

You need to give both copies of the table their own alias (here: parent and child) because otherwise you will run into uniqueness troubles.

Answer 3

One way would be to create a loop that repeats a simple query.. I could post an example here. Are you using PHP?